Typically the way to go would be to get into contact with one of the members behind SciNim and coordinate from there.
https://github.com/orgs/SciNim/people
Looking at the list here, you can see there is at least 2 Members in there that I know are active in the nim discord (Vindaar, Hugo Granström).
Not entirely sure about Juan as I haven't heard from them in a while and I know Clonk is still active (and might even be on the discord! If so I just don't know their name there).
Hello,
Indeed, at least Hugo, Vindaar and me - at least - are still active.
We're still figuring out github discussions, so in the meantime you can open an issues on the getting started https://github.com/SciNim/getting-started/issues and so we get notification (since there is none) on this forum.
We are usually active on Matrix (bridged to discord so we appears as "bot") and we usually answer questions on the "science channel"